15316420 has 36 divisors (see below), whose sum is σ = 37418220. Its totient is φ = 5251008.

The previous prime is 15316393. The next prime is 15316421. The reversal of 15316420 is 2461351.

It can be written as a sum of positive squares in 2 ways, for example, as 12054784 + 3261636 = 3472^2 + 1806^2 .

It is a junction number, because it is equal to n+sod(n) for n = 15316391 and 15316400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15316421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6835 + ... + 8794.

It is an arithmetic number, because the mean of its divisors is an integer number (1039395).

Almost surely, 2^15316420 is an apocalyptic number.

15316420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15316420 is an abundant number, since it is smaller than the sum of its proper divisors (22101800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15316420 is a wasteful number, since it uses less digits than its factorization.

15316420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15652 (or 15643 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 15316420 is about 3913.6198077994. The cubic root of 15316420 is about 248.3432854391.

Adding to 15316420 its reverse (2461351), we get a palindrome (17777771).

The spelling of 15316420 in words is "fifteen million, three hundred sixteen thousand, four hundred twenty".